Re: [yt-dev] Data access along streamlines in yt 3.x

Hi Matt, Thanks for getting back to me so quickly. I’ve been pretty happy with the yt streamlines interface and being able to access fields of a dataset on given streamline would be especially useful for a project I’m currently working on. I would be happy to contribute though I’ll admit I do not have any experience working with cython (which I see yt/geometry/selecttion_routines.pyx is written in). I’d be happy to drop into the slack channel tomorrow to discuss this further. Clicking on the slack link at http://yt-project.org/community.html http://yt-project.org/community.html, it looks like I need an invite to join the chat. Thanks again! Will

On Aug 2, 2016, at 1:56 PM, Matthew Turk wrote:

Hi Will,

Thanks for your email! I just checked, and indeed, that you can't access them. But, I don't think it would be terribly difficult (although likely a bit baroque) to implement the access protocol, and I think it would be a great addition. I think that it would require implementing a streamline data selector in yt/geometry/selection_routines.pyx. The streamline path object itself has a positions attribute, which gives the position at each point in the streamline. This can be accessed in the selection routine in an implementation of select_cell.

I'd be haappy to work through this with you, if you'd like -- you can join our slack channel (it should currently allow guests, or we can invite you) and we can talk through this if you'd like.

-Matt

On Tue, Aug 2, 2016 at 11:40 AM, Will Barnes mailto:wtb2@rice.edu> wrote: Hi all,

I was wondering if there is currently an effort to implement data access along streamlines in yt 3.x. The streamline documentation (http://yt-project.org/doc/visualizing/streamlines.html http://yt-project.org/doc/visualizing/streamlines.html) indicates that this functionality is not yet available in 3.x, but seems to imply that it was available in previous versions (possibly 2.x?).

If no one else is working on this currently, I would be interested in contributing to this feature. However, I am relatively new to the yt codebase and don’t know what level of expertise would be needed. Any comments/feedback would be appreciated.

Thanks!

Will Barnes

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